Photographic camera



Feb. 25, 1941. E; s HmELmE 2,233,345

PHOTOGRAPHIC CAMERA Filed Aug. 5, 1939 12 Sheets -Sheet 1 INVENTOR. %an/g e V 23. Ju& %is ATTORNEYS Feb, 25, 1941. E. s. HlNELlNE PHOTOGRAPHIC CAMERA Filed Aug. 5, 1939 12 Sheets-Sheet 2 .L llllllllllll HU II l HHH 4 INVENTQR EWsonHnszw v BY %zA ToRNEYS 25, 1941. E, s. HNELNE 23 9 moroammxc emm&

Filed .Aug. 5, 1959 12 Sleets-Sheet 4 /14 mmm\ LN a mam'

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12 Shoets-Sheot 6 HIIIII a s. HINELINE PHOTOGRAPHIC CAMERA Filed Aug. 5. 1939 Feb. 25, 1941.

INV NTOR. ,mo/&15

%is ATTORNEYS Filed Aug. 5, 1939 12 Sheets-Sheet 7 -%2I;ATTORNEYS E: s.- -NELNE 233.345

PHoTodmHIc CAMERA Filed Aug'. 5 1939 -12 Sheets-Sheot a INVENTOR. 65 WSOMSMZzhe 1 E. s. HINELINE 23 .3 5

PHOTOGRAPHIC emmm I Filed Aug. 5, 1939 12 Shets-Sheet 9 %i ATTORNEYS E. s. HKNEILIN 2233345 Feb. 25, 1941.

12 Shouts-Sheet 10' A Find Aug. 5, 1939 INVENTOR. ;EwnE'nc %ATTORNEYS Feb. 25, 194L s. HINEUNE 2 3 PHOTOGRAPHIG CAMERA Filed Aug. 5 1939 manena-shen 12 Faso 'zlsATTORNEYS Patented Feb. 25,' 1941 UNITED STATES PAT'ENT OFFICE a PHOTOGRAPHIC CAMERA Edson s. nineline, Rochester, N. Y., assignor to The Folmer Graflex Corporation, Rochester, N. Y.,acorportion ot Delaware Application August 5. 1939, Serial No. zsasos i 18 Claims. (01.95-31) This invention relates to photographic cameras oi novel constructionlending itself to modern manuiacturing practices.

In order that the principle oi' .the invention may be readily understood, I have disclosed a single embodiment or example thereoi' in the accompanying drawings, whereini Fig. 1 is a top plan View of the camera showing the location of the various Controls;

Fig. 2 is a rear view of Fig. 1 with the filmloading door removed; a

Fig. 3 is a top plan view oi the curtain gear assembly and release cam plate when the first curtain isiully wound to re-set position;

Fig. 4 is a top plan view of the curtain winding gears and release cam plate in the position occupied when the firt curtain has i'ully run down:

Fig. 5 is a detail of the curtain rewind gear assembly when the curtains are i'ully wound, being a side elevation of Flg. 3; t

Fig. 6 is a view similar to Flg. 5 when the curtains are iully run down, being insubstance a side elevation of Fig. 4;

Fig. 7 is a section of Fig. 6 on the line 1-7 thereof:

Fig. 8 is an enlarged detail in plan of the shutter speed setting dial and knob;

Fig; 9 is a partial top plan view of the camera with the shutter mechanism plate removed' to show the shutter mechanism in set condition:

Fig. 10 is a detail of the second curtain release i lever;

Fig. ll' is an edge view of Fig. 10:'

Fig. 12 is an enlarged detail oi' the idler gear pivot plate;

Fig. 13 is a detail in section showing the mirror re-set mechanism; i

Flg. 14 is a vertical transverse section through the shutter and film transport mechanim, showing its relationship to the mirror re-set mechanism. 4

Fig. 15 is an enlarged secti'onal detail of the mirror release lever and the mirror re-set mech-` l anism;

F'ig. 16 is a top plan View similar togFig. 9, wherein the shutter has been .released and the first curtain has run all the way down;

Fig. 17 is a vertical transverse section through the 'camera showing the positior` 'of the mirror after it has been released and the relation of its associated parts;

Fig. 18 is a detail of the mirror re-set cam member, the first curtain having run all the way down; 4

Fig. 19 i a vertical transverse section through broken line 34-34 thereoi:

the camera showing` the positionoi' the mechanism when the shutterhas been rewound and is ready !or a second exposure: y

J Fig. 20 is an enlarged detail of the mirror re-set cam mem-ber in the position it occupies when 5 -the mechanism is positioned as in Fig. 19;

Flg. 21 is a`top plan view similar to Fig. 9,

' 'both curtains, however, having been released and run all the way down; i

Fig. 22 i an enlarged detail of the bulb ex- 10 posure rocker arm; I

Fig. 23 is an edge view oi Fig. 22; a

Fig. 24 is a plan view of part of the shutter mechanism showing the position of the slow shutter speed retarding lever when the retarding 15 lever is about to release the second curtain:

` Fig. 25 is an enlarge'ddetail o! the slow shutter speed retarding lever; x

,' Fig. 26 is a plan view similar to Fig. 8, except- 'ing that the dial has beenmoved to indicate a 20 speed oitool second; Flg. 27 is an enlarged plan view with a part oi the shutter winding -mechanism cut away to more clearly show the construction of the rewind friction drive, a section ofthe shutter plate hav- 25 ing been cut away to show more clearly the operation of some of the partsr Fig. 28 is an enlarged detail assembly in transverse 'section showing the reiation of the slow' shutter speed dial and its associated mchanism:

Fig. 29 is a vertical section through the camera showing the curtain rollers, the film rewind spool in section and the slow shutter speed retarding mechanism:

Fig. 30 is an enlarged plan view of the shutter slow speed retarding mech'anism;

Fig. '31 is* an enarged detail of a part of the I slow shutter speed control member;

Fig. 32 is a topplan view of the camera withthe film feed mechanism cover removed to show 40 the iim feed mechanism, a part of the shuttermechanism cover having been broken away to show the interlock between film winding mechanism and film feed mechanism;

rewlnding oi film to the position of first exposure;

Fig. 38 is an enlarged detail showing the condition oi' the film measuring or spaclng mechanism during rewinding o! film; but before the interlocking mechanism has commenced to !unction; and V Fig. 39 is a detail oi abulb Operating rocker arm and a cooperating bell crank.

An important object of my invention is to provide a camera having a shape that is convenient tohold in the hands with the greatest amount oi comfort. combined with easy operation. Other obiects are to provide a camera with a self-capping shutter that is rewound automatically with the winding of the film, to provide means for obtaining slow shutter speeds without the manip-` ulatlonor auxillary winding knobs, and to provide a film ieeding and measuring device with interlocked shutter rewinding mechanism to prevent the possibility o! double exposure.

I shall reier first to the general oonstruction o! Operating parte shown in l 'lgs. 1 and 2. Therein the shutter cover plate is indicated at II, the index mechanism cover plate at 19. the'camera body at the objective lens at li, the release button at II, the camera backlatches atl, 23, the mm winding lever at 24, the shutter setting -or shutter winding Imob at ll, the slow shutter speed pointer at 28, the slow shutter'speed knob at !1, the ground glass screen at 2', the exposure !rame window at 29 and the counter dial knob at u.

The take-up spool shalt is indicated at Il in Fig. 2 and elsewhere. the take-up spool driving dogs at 82, the take-up spool shalt at u, and the The first or No. 1 curtain take-up roller is indi-,

cated at ll and the second or No. 2 curtain takeup roller at ss. The'tenslon roller for the second curtain is indicated at III, and the tension roller i'or the first curtain' is indicated at ll. The takeoii' spool housing is indicated at 42,-the take-ot! spool shatt at u, the take-oil' spool driving dog at Il, the take-oi! spool stub shalt at u and the tripod socket at l In the use of the camera, a spool of sensitized material customarily rererred to as the nlm is placed in a' film chamber l'l indicated at the right in Flg. 25- The film is led' across back o! the camera onto a take-up spool in the spool chamber u. and is caused to be wound up by the action of the winding lever u, as will be more i'ully described hereinai'ter.

Shutter and shutter window- The shutter used in the camera herein disclosed is similar to the shutter disclosed in my earller co-pending application Ser No. 271.335. but it diflers therefrom principally in the control means therei'or.

The shutter does, however, employ the two curtain SI, SIA, respectively shown most clearly in Flgs. 2 and 29. The position of the said two curtains. when the camera mechanism is in condition for making an exposure. is clearly shown in Fig. 2; wherein the curtain ribbonsl'l, ll' oi' the first curtain :I are entirely wound upon the spool or roller [the second curtain "A being wound up on spool or roller SI. said tirst curtain I! is also attached to curtain rouer ll and second curtain ribbons II, I! are atta'ched to curtain tension roller 40. The curtain roller or spool is provided with apinion u shown in dotted line: in

asaass Fig. 2, as meshing with the curtain winding gear sn' shown in dotted lines in Fig. 2 and upon a larger scale in Flgs. 3, 4, 5 and elesewhere. The curtain spool or roller 39 is provided with a pinion !I shown in dotted lines in Fig. 2 as meshing wlthcurtain winding gear 52, also shown in dotted lines in Fig. 2, and shown upon a larger scale in Figs. 6 and '7 and elsewhere. The said pinions 48 and !I and the curtain wlndlng gears 50 and I! are most clearly shown in Flg. 17, enlarged details being, .however. shown in Flgs. 3 to 7.

As shown in Fig. 5, the curtain winding gear 50 has attached a hub and cam plate 54 is also. attached by rivets a (Fig. 9). Cam plate M has a notch ll clearly shown in Figs. 3 and 4. Gear lil also has a stud or pin 58 hereinaiter referred to. Gear 52 has an upper hub' 51, a lower hub BI, a rewlnd pin 59, release pin 80 and slow shutter control pin Il. Gear 50 is carried on shai't 83 and keyed thereto by means oi a spline clearly shown in Fig. 14. Gear 52 is free to rotateonshaft 83 through a part o! a revolution, and is separated from gear Il by a suitable thrust washer and !rom mechanism-housing lower plate OI by thrust washer 88. A stop pin fl is attached to mechanism-houslng plate Bi, as clearly shownin Figs. 5 and 6. The purpose ot stop pin 81 is to engage pin !I in gear 52 when the second curtain has traveled its i'ull distance.

The purpose of pin !I on curtain-wlnclng gear !II and rewind pin I! on curtain winding gear 52 is to cause said gear I! to be carried with gear 50 when gear !0 is turned in a contraclockwise direction .to rewind the shutter curtain. Pins 58 and B! serve also to hold the second curtain when the shutter isin an entirely rewound condition. Attached to the lower part o! shalt 83, as shown in Figs. 14, 17 and 19, is a cam member BI keyed to shalt I: by pin u and held in place with lock ring a (Figs. 17 and 19). The said cam member u carries a dog 'll which engages with stop member 'li attached to mechanism bracket 12 and camera wall 'I: (F'igs. 14, 17, 29, 30', etc.) with screws N. 14, most clearly shown'in Fig. 17. The purpose oi' this stop is to limit the motion of the first curtain winding gear lil at the completion of its travel.

Again referring to Fig. 2, the curtain take-up roller :I is provided on its lower end with a iormation (not shown) engaging a hearing 15. The second curtain take-up roller 38 is also provided with a formation engaglng a hearing 16 at its lower end. The first curtain roller u is provided with an extending ,shatt 11 and the second curtain roller 30 is provided with an upwardly extending shaft ll, both shown in dotted lines in Fig. 2. The pinion u is attached to said shaft T'I .by means of a spline (not shown) and held thereon by screw 19 most clearly shown in Flg. 9, and shatt TI is provided with a pinion ji, best 'shown in Fig. 9 as attached in a like' manner and held by a screw o. The construction oithe curtain tension rollers 40, ll is most clearly shown in Flg. 36, whereln the camera bottom plate is indicated at Bl, the tension roller hearing at 82, the tension roller hearing lock nut at II, the curtain roller bushlng at N, the curtain roller tension shai't at Bl and the curtain roller tension spring at I', the latter having one end engaging a hole 81 in the shalt CI. The other end engages a hole-u in curtain rollerbushing Il. said curtain roller bushings u and sa are attached to curtain roller lil and are held integral therewith. curtain tension shalt 85 has an upwardly extending end provided with threads 90 passing through a hole 9! in the upper camera wall 92 and is engaged by shoulder screw. or nut 93. shaft is also provided with' a shoulder 94 which engages washer 95. A second washer 96 is fitted over the upper end of shaft 55. This structure provides a ready means of adjusting curtain-roller tension, which is accomplished by engaging a screw driver in slot 960. of shaft 85 after having first loosened nut 93, which also has a slotted head 91. The shaft 55 then can be turned in a clockwise direction to increase the tensionof the spring 06. When sumcient tension is obtained, the nut 'or shoulder screw 93 is turned in a clockwise direction, thus holding shaft 65 in a fixed position through the friction of washers and 96 enga'ging camera wall 92. The curtain tension roller 4|.is of similar construction, and therefore need not be described in detaii.

Again referring to Fig. 2 (and Figs. 3 to 6), it will readily be understood that if gears 50 and 52 were caused to turn in a contraclockwise direction, pinion 49 m'eshing with gear 50 and pinion 5! meshing with gear 52 would be caused tottu'n in a clockwise direction -as viewed !rom the top of the camera, thus winding up on curtain rollers 38 and 39 respectively, curtain tapes or ribbons 31 of the first curtain 35 and the second curtain 35A. The curtains will now appear as in Fig. 2 in the fully wound condition or in that condition just prior to making an, exposure. When gear 50 is released in a manner hereinafter explained;

pinion 49 meshing with gear 50 will be free to turn, and also the curtain 'roller 30 which is attached to gear 50 is free to turn and the first curtain 35 will then be wound up on curtain roller 4! undervthe influence 'of curtain roller spring 66. The construction of curtain roller 4! and spring 86 is most clearly shown in Fig. 36, already referred to. When gear 52 is released pinion 5! which meshes therewith, is free to turn. The curtain roller 39 is also !ree to turn. thus allowing the scondcurtain 35A to be wound up on curtain roller 40 under the influence of spring 56.

However, means are provided to control the timing of the release of gear 52 with respect to the release of gear 50 so as to provide means for controiling the slot width between the first curtain 35 and second curtainj5A, and thus obtains exposures of different time (that is to say, to obtain` a different slot width).

As previously stated, gear 50 is provided with a pin 56 and gear 52 is provided with pins 59, 60 and 6! all most clearly shown in Figs. 3.4, 5, 6 and '7. over the hub 5301' gear 50 is titted the shutter speed knob 25, also shown in F'lgs. 1 and 2, and having a hub !00 most clearly shown in Fig. 14. said knob 25 is caused'to be thrust downwardly to the position shown in Fig. 14, under the influence' of spring !0! (Fig. 14) until the end oi' hub !00 rests-on cam plate 54 that is attached to gear 50. Spring !0! is held down by shutter setting dial !02 (Fig. 8) that is held to shaft 63 by shoulder screw !03. Saidknob 25 is provided with a pin !04 which engages holes !05 and !05a of shutter plate 54, most clearly shown in Figs. 9, 21 and 24.- The knob 25 can be raised to the positon shown in dotted lines Fig. 14, and then revolved around the hub 53 until pin !04 engages any one of the holes !05 and !05a in cam plate 54. This constitutes means for changing the position of pin !04 with respect to gear 50 and cam plate 54. said pin !04 also serves to key the knob 25 to the cam plate 54.

Thus the knob 25 is caused to .turn with cam plate 54. said knob' 25 is provided with an indexmark !06. The index plate !02 is provided with a series of shutter speeddesignations !01, !01. This provides means for selecting the position of pin !04 with respect to cam plate 54. As shown in Figs. 9 and 14, the upper end of shaft 63 is provided with fiats. The index plate !02 is provided with an' opening !08 (Fig. 8) to fit over the upper end of shaft 63, and it is held in place by screw !03. Since curtain winding gear 50 is keyed to shaft 63 and camplate 54 is riveted to gear 50 and index plate !02 iskeyed to shutter curtain 35, 35A are run all the way down.

In such situation the pin 6! on the gear 52 will be held against pin 6'! on mechanism housing plate 65 under the tension of shutter curtain 35A. As previously stated, said gear 50 is attached to shaft 63, and shaft 63 carries cam member 66 having a stop dog 10 held against stop 1! under the tension of curtain 35 and curtain ribbons 31. This construction is best shown in Fig. 4 in dotted lines,

and also in Figs. 14 and` 17. When shutter setting dial 25 is turned contraclockwise, it carries with it curtain winding gear 50 and cam plate 54 by means of pin !04 on knob 25 until the cam plate notch 55 reaches the position. shown in Figs.

3 and 9. As the gear 50 is turned` in a contrareaches the position shown in--Fig. 9, an extended portion !09 of first curtain release lever !!0 pivoted on shoulder screw !!0a, will engage said notch 55 under the influence of a spring'llflb,

thus holding the cam plate 54, gear 50 and gear 52 in this position, which is the curtain reset or' "ready" position. The shutter setting or winding knob has been referred to as the means for restoring the first curtain 35 and second curtain 35.& to the reset position, but in reality said knob 25 does not strictly serve this purpose, since the curtains 35 and 35A are reset through the medium' of idler pinions !!2 and !!3 and shutter drive gear-4, shown in Figs. 9, 12, 14 and'21. The said idler pinions !2 and !3 are attached to a pivot plate !!5 by means of shoulder rivets !!6, 6, as shown in Fig. 12. The said pinion pivot plate !!5 is provided with an extending arm !!Ia having an upturned end !!1, and said plate !!5 is caused to move in a clockwise direction under the influence oi' spring !!8 (Fig. 9).

Film winding-The construction of the film winding mechanism is shown in section in 'ig. 14, wherein a shaft !!9 Dasses through mechanismbottom-piate 65 which has an upstanding portion !20 iorming a hearing thereior. is provided with fiats !2 I, !2! over which a ratchet sleeve !22 is placed, which has formed on .its lower end a ratchet wheel !23. The pivot plate !!5 of Fig. 12 is provided with a hole !24 tor the purpose of fitting over the ratchet sleeve !22, and it is free to pivot thereon under the influence of spring lis. Beneath plate !5 is a spacing washer !25, and between washer !25 and the ratchet wheel !23 is fitted a bulb Operating plate or rocker said shaft I! 9 arm l2l, a detail whereof is clearly shown in Figs. 22 and 23. said plate !28 is provided with studs !21 and !28, upturned ends !29 and !30 and a hole !3!. The ratchet sleeve !22 passes through hole m as clearly shown in Fig. 14. The Operating plate !2I is caused to rotate in a clockwise direction under the influence oi' spring !32 coacting with the upturned end !29.

The extending sleeve !22 oi the ratchet wheel !23 has fitted thereover the gear sleeve !33 01' the gear !!4. The said sleeve !33 is free to turn on sleeve !22. However, sleeve !33 is provided with a key way !25, shown most clearly in Figs. 16 and 21, into which a key !30 of the clutch drive member !31 is fltted, which is also provided with a second keying means !38 engaging clutch spring I, the latter being a cylindrical spring tending to open out against the inner wall oi winding knob o, as most clearly shown in Figs. 14 and 27.

As can be clearly seen from Fig. 27, ii the film winding knob is turned in a clockwise direction, the clutch spring !38 tends to travel with the winding knob ll!! due to the pressure exerted by the said clutch spring, which carries with lt the upturned portion m o! -keying member !31 and the inward turned portion of keying member !21. since the key I engages slot oi the sleeve III, the latter will also be caused to turn unless an undue load is placed on sleeve m and gear 4. Thus gear !14 can be stopped but the film winding knob !40 can continue to turn because oi' the !riction engagement between it and the driving spring I". The purpose of this provision will be more !ully disclosed presently.

Again reierring to Fig. 14, the said film winding knob !40 is keyed to shaft I!! by means of the said flats l2l, !2!.on shai't Il! and the hole in knob !40 to ensage therewith. Also engaging said flats !2!, !2! is a ratchet plate N! and a spacing washer lfl. said sleeve !22, knob III ratchet ll! and spacer !42 are` clamped to the shalt !l by means o! shoulder screw !13. The shoulder portion i of shoulder screw !43 has sumcient length to allow winding lever 24 (Fig. l) to rotate freely thereon. A ratchet pawl plate is !ree to rotate about the spacing Washer n, but it has riveted thereto a pin !u which, as best shown in Fig. 82,. carries ratchet pawl !t'I engaging mm winding lever u. A spring !Il holds ratchet pawl !41 in engagement with ratchet III. It will be seen that any movement of the iilm winding lever 24 in a ciockwise direction will cause the winding knob m to be also turned in a clockwise direction, but 'when said film winding lever il is moved in a contraclockwise direction', no motion of knob u will take I place.

The purpose oi the structure just described is to enable the operator to rewind the shutter at the same time that a film spool is turned !or winding or ieeding the mm. Since it will always be necessary to turn the film spool a greater distance than the shutter rewinding mechanism, it is necessary to provide a clutch means, one construction oi' which I have set forth.

combined film winding and shutter winding-As previousy stated mainly with reference to mg. 9, the pivot plate !li carrying gears !!2,

mesh with gear 50. As the film winding lever 24 is rotated in a clockwise direction, the shutter drive gear !M is also caused to rotate in a clockwise direction and through pinions !2 and !ll the curtain gear 5!) is caused to turn in a contraclockwise direction until said gear I!) is in position shown in Fig. 9. This will complete the shutter winding and any further motion of the film winding lever 24 can only take place through the slippage of clutch member !39, be-

-cause said curtain gear is prevented from turning by reason of the dog' !09 of lever" Ilfl engaging slot of the cam plate 54. However, it is necessary further to wind the film spool, which is engaged by shaft end 3! or shatt I!! having the key 32 for engaging the Slots in the take-up spool. The motion of film winding lever 24 is continued until suiTicient film has been wound on the film take-up spool to provide an area !or the next exposure, after which all motion of the film winding knob !40 is arrested through ratchet pi ate !23 by means to be more tully described presently.

{Mirror movement (not herein claimed) .--The camera is also provided with a mirror !rame I", shown in the set position in Fig. 14 and in the released position in dotted lines Fig. 17, and again in the set position in dotted lines Fig. 19. As shown in Fig. 14, the mirror !rame !49 is provided with an angle plate !50 !or holding the mirror in set position. said mirror !rame is provided with a hinge portion I!! and a spacer !52 having a pin !53 passing therethrough and mirror is released, it Will move upward into posltion shown in Fle. 17.

The mirror !rame is also provided with a stud !54 which passes through the camera wall u. The said stud is provided with a reduced end por tion !55 which enga'ges mirror reset arm IBE, most clearly shown in Figs. 15, 17 and 19. An opening !51 in the camera wall 12 allows mirror stud !54 to travel through an arc of approximately ninety degrees. said arm I!! is provided with an elongated slot !68 (Fig. 19) tor engaging pin !55 oi' stud !54. Thus any motion of the arm !50 will be transmitted to the mirror frame !18. said arm !58 is pivoted on a shoul- V der stud !59, shown in Figs. 15, 17 and 19. Also pivoted on shoulder stud !58 is a second arm !60 having a bent-over portion !BI whichls engaged by spring !82 tending to cause arm !80 to rotate in a clockwise direction 'until the bent-over portion N! engages arm !56, thus causing any motion in a clockwise direction oi' arm !sn to be 'transmitted to arm !58. said arm !80 is also provided with a stud !N which is engaged by mirror reset cam !84, most clearly shown in Figs. 13, 14 and 15,' thepurpose oi which is to cause the mirror frame !49 to be reset when the shutter curtain is rewound. This will be more iully described after I have described the manner of making an exposure. A third lever !II is also pivoted on stud' n having an inwardly turned portion !68 passing through'opening !Isa (Fig. 19) in the camera wall and an upwardly extending arm !61 passing through an opening !Bla (Fig. 9) in the mechanism-bottomplate. The purpose oi' the inwardly extending portion !68 is to hold the mirror in set position as in Fig. 19. Said lever !BI is caused to rotate in a 'clockwise direction about pivot !59 under the influence of spring !66.

Instantaneous exposure.-I'will now describe the manner of making an instantaneous exposure for which the Shutter-setting knob and dial !02 will be in the position shown in Fig. 8. The Shutter control mechanism will be in the set condition shown in Fig. 9. Pressure on Shutter release knob 22, having a shaft !69 and a Washer !10, will engage bell cranks and !12. Bell crank is mounted on a shoulder screw !13 and bell crank !12 is mounted on a shoulder screw !14. Bell crank I'll will be caused to rotate in a contraclockwise direction and bell crank !12 in a clockwise direction. When bell crank is caused to rotate in a cortraclocl-' `is carried therewith. causing the arm !56 to be Figs. 15 and 17. The arm !66 is provided with a part !15 (Figs. 16 and 19) which engages an 'arm !1601 the -shutter .release lever lili. Thus the dog or projection I!!! of said lever I!!! is withdrawn from slot 55 of the cam plate 64. Prior to this action of the mirror !rame !49, the beli crank !1 2 is also rotated about its axis at shoulder screw !14. said bell crank !12 is provided with a cam shaped end most clearly shown in detail in Fig. 39, the purpose of which is to engage the stud !21 of rocker plate !26,

shown best in Figs. 22, 23 and 39.

The rocker plate !26, whose mounting has previously'been described, is caused to rotate in a contraclockwise direction carrying with it the upturned end !29'which engages upturned end (Fig. 12) causing gear pivot plate !IS also to be rotated in a contraclockwise direction, thus disengaging pinion !!2 from curtain-winding gear 50. This action takes place prior to the releasing of said mirror frame !49. Thisis necessary in order that gear 50 will be free to rotate when dog !09 of lever o is disengaged by extending arm !15, which is actuated by the mirror !rame !49, as previously described.

When the arm !16, which passes through the slot !19 of the mechanism bed plate 65, contacts with the arm !16, thrusting lever o in a torward direction, it dis'engages dog !09 rrom slot 55 in the cam plate 54, thus allowing curtain winding gear 50 to rotate. At the time the Dinion !!2 became disengaged from curtain winding gear 50, the upturned end !30 of the rocker plate !26 was also carried in a contraclockwise direction away from the born-like end o! a lever !8!, most clearly shown in detail in Figs. 10 and 11, and constituting the second curtain release lever. said lever s! is of a folded sheet metal structure really forming three arms, namely, arm !80 previously referred to, disengaging arm !82 and dog !83, the whole being pivoted on screw !84 and being under the influence of spring !85,-shown in Fig. 23. Whenthe button 22 was pressed as previously described and rocker plate !26 was caused to move in a contraclock'wise direction allowing horn-shaped arm !60 to m'ove in a contraclockwise direction,.the dog !63 was permitted also to move in a clockwise direction and to engage pin 60 of curtain winding gear 62, as

`most clearly shown in Fig. 16. The mechanism will now be in'the position shown in Fig. 16 wherein the curtain winding gear i!! carrying cam plate 54 has turned through a partial revolution and carried with it pin IM, which on further' turning will enga'ge said lever end !82, causing dog !83 to be removed from the face ot pin 60 of curtain winding gear 52, thus allowing the second curtain 35A to close. The setting just described is for a wide opening (that is. the greatest possible slot width), and it is with this slot width that the th second exposure takes place,

It will clearly be seen that if pin !04 15 set to engage any one of the other index holes !05, !III of the cam plate 54, the arm !82 of 1ever'!6! will be caused to be thrust outwardly at an earlier time, thus releasing the second curtain A at a shorter interval after the release of the first our-- tain 35, and thereby providing a narrower aperture in the curtain structure.

If for example, the pin !04 were in the position shown in Figs. 26 and 27, the shortest aperture would be provided. That is, the second curtain 35A would be released almost as soon as the flrstcurtain 35 gets in motion, thus providing a very narrow aperture and a very high Shutter speed. If, however, pin !04 were set in the locatiom of index holes !05, the curtain release pin !04 would never contact with the arm !62 ot lever !6!, because curtain winding gear N and cam plate 54 would be stopped beiore pin !64 reached contact arm !82, by reason ot the dog 10 of the cam member 68 striking stop "Il, as shown in Fig'. 17. Therefore, the pin !04 under such conditions would not release the second curtain 35A. The first curtain 35 would run all theway down and leave the aperture fully open and the second curtain 35A would be held wound up on the curtain roller 39, thus providing a tull aperture. An exposure' would take place and continue until exposure button 22 is released. Rocker plate or arm !26 would thereupon be caused to .move in a clockwise direction under the influence of spring !32 against upturned end !26 of the bulb exposure rocker arm or Operating i disengaging dog !83 from pin 60 of the curtain winding gear 52, and allowing the second curtain 35:& to close. This type of exposure is commonly called a "bulb" exposure. The structure of bulb exposure rocker arm !26 (Fig. 22) and gear pivot plate !li (Fig. 12) with upturned end engaged by upturned end !30 when rocker arm !26 is moved in a contraclockwise direction, is provided to allow rocker arm !26 to return to starting position, whereupon gear pivot plate I!! will be returned to its starting position under the influence of spring a, causing gear !l2 to mesh with curtain winding gear 50. The dog !83 will nevertheless engage pin 60 even though pinion !!2 does'not fall into mesh with curtain winding gear 50.

'As curtain winding gear 50 is released and allowed to turn in a clockwise direction, it allows the first curtain 35 to run down, the shaft 63 turning with gear 50, and cam member 66, in turning, carries with it the cam !64. Since mirror frame !49 was in its upper position before curtain gear 50 started to rotate. roller !63 will be in position shown in Fig. 15, and as said cam member 68 revolves in a clockwise direction, its cam !64 Will raise roller !63, thus causing it to pass over the top surface of cam !64. said roller li: on lever lto'can move upward away from lever lil under the influence of spring III. thus allowing cam IM to pass under roller i while the mirror is in the raised position. This action is most clearly shown in Fig. 15.

Snubber or c'shion'ng action-The action of cam I in raising roller m also serves as'a snubber on the first curtain li. A gradually increasing pressure is introduced by the tensioning oi spring Is! as the cam I passes .under the roller I. After said cam I has completely passed roller !83. said lever s returns to its position shown in Figs. 17 and 18.

The mechaism is now in the position shown in Figs. 17, 18 and 21, wherein the mirror !rame i is in the up" position; curtain winding gears !I and 52 have allowed the curtains II and ISA to run all the way across and pinion li! is again engaged with curtain winding gear 52 under the influence of spring Il! and the upturned end ll'l of pivot member lil which, as stated, carries pinion 2 and III.

second exposure.-Before a. second exposure can be made, it is necessary to restore the shutter mechanism to the condition shown in Fig. 9 and at the same time to rewind or feed a new -supply of film. This is done in the following manner.

Rlewind lever 24 (Figs. 1 and 32) is moved in a clockwise direction and then returned, and this motion is repeated until said lever 'can be moved no further in a clockwise direction. When said lever 24 is moved in a clockwise direction, gear ill (see Fig. 21) is thereby caused to rotate in a clockwise direction, driving pinion lllin a' contraclockwise direction, pinion ii! in a clockwise direction. and curtain winding gear ll in a contraclockwise direction. This motion will continue until curtain' winding gear II and cam plate u are returned to the position shown in Fig. 9, wherein dog o of lever o will drop into notch !I of camplate u, thus stopping curtain winding gear 50 from turning further. said gear N carries a stud or pin I', shown in section in Fig. '7, and the curtain winding gear 52 carries a stud or pin As the curtain winding gear !I advances in a contraclockwise direction carrying with it stud 58. said stud will contact with stud I! or curtain winding gear u. carrying said gear 52 along with said gear N until the condition results shown in Fig. 9. Thus both curtains II and IIA have been restored to the 'closed position. When the said -curtains have' run all the way down. there will be a space separating stud Il from stud ll. This space is sumcient to allow said first curtain :i to overlie said second curtain "A so that. when said curtains !I and !IA are returned to the fully wound position, they will overlie or "cap" as the curtain passes the exposure opening. i

As the curtain winding gear u was first turned in a clockw'lse direction; the mirror !rame I was in the position shown' in Fig. 17. .Levers -III and I are also in the position there shown, and cam member !I and cam I were in the position shown in Flg. 17 and also in Fig. 18

position shown in Figs. 14 and 19 through the agency of roller III. lever I", the turned-over portion lil, lever i, and pin !54 on stud I". The shutter mechanism and the mirror frame m will now be restored to proper condition for a second exposure. It is to be understood, however, that I have not yet described the manner in which* forward motion of the lever 24 ls- *stopped after the shutter has been rewound.

This I will do after describing the slow shutter speeds. i

Slow shutter speed.-I have previously referred to the slow shutter speed knob 21 ,and the slow shutter speed pointer 28, shown in Fig. 1. On shutter plate' IS. Fig. 1, I have provided a series oi' numerals. l designating one second. 2 designating second, I designating' second, and in designating second. I is a setting for all instantaneous speeds. For all speeds thus far described, the slow shutter speed pointer 28 was in the position of I, which is the position the parts occupy in Fig. 27. For the so-called slow shutter speeds or those speeds wherein a time deiay is introduced between the instant the first curtain 35 is releasedand the second curtain !SA is released, the shutter setting dial !02 and shutter setting knob will be positioned as in Fig. 8, .with the index pointer [06 opposite ZI-S .of the shutter speed dial m.

Fig. 28 clearly showsthe construction of the slow shutter speed knob 21, nd the pointer with its related parts. said knob 21 is mounted on a shaft ill by means of fillister head screw s. said knob 21 is provided with a notch i and the slow shutter speed pointer 26 is provided with an upturned key Isli. The shaft is provided with an enlarsed upper end i!! with flats !92 which engage an index plate !93. The shaft ill passes through shutter cover plate i! (Fig. 1), and has attached to its lower end a boss I which has an enlarged fiange !95 provided with extending prongs I", i. The boss IN passes through a hole in the mechanism-housing lower plate I. The index plate I is provided with a raised conical portion I to engage a series of indentations i, I" of. the shutter cover plate i'. One indentation is provided for each position of the slow shutter speed pointer ZI, as indicated in Fig. 27. The purpose of this construction is to provide a lock to hold the pointer !I in any of the selected positions.

In Fig. 19 is shown that portion of the slow shutter speed operating mechanism that is below the lowershutter plate Il. Therein is shown at III a shutter retarding lever having an-upturned end'nl. A detail of said lever ll! is shown in Flg. 25. It is provided with two cut-outs forming sectors "i, III. The said lever is riveted to 'shaft 202 as most clearly shown in Figs. 17, 19

over-lying a pin I of shaft !02, thus keying the member I" to said shaft 202. said pin "I is shown in position in Fig. 19 and in dotted lines Fig. 17.

has 'a turned-down end ill which over-rides member III. ss shown in Fig. 17.

The spring !II is both an emndingspring and 'a toriona spring. that is,-haft m is thrust downward by said spring m and member I".

A spiral spring I having a hook end !II is. hooked on the upper hearing III, and it z end of rocker arm 2 !3 is provided with a bent-over portion having a rounded upper face 2!5, the shape of which is mostclearly shown in Fig. 14.

The opposite end of the said rocker arm 2!3 is provided with a bent-out end 2!6 which underlies the rounded end of shaft 202. On the said face 2!5 rides the lower end of cam member 68 which has a cut away portion 2 (shown in Figs. 14, 17, 19 and 20) forming a cam for Operating the rocker arm 2l3. The position of said cut-out portion 2!`! of cam member 80 is such thatwhen the first curtain 35 has run all the way down, the end 2`!5 of said rocker arm 2 !3 rides up on .the surface 2 8 of cam member 68, as shown in Fig. 17, thus raising shaft 202 against spring 209 and retarding lever !99. The upturned end 200 is now in position in front of pin 6 as 'clearly shown in Fig. 17.

This cycle is so timed that said upturned end 200 is raised into the described position in relation to pin 6! just before the dog !83 (Figs. 9 and 10) is re'tracted from pin 60. It will readiiy be seen that if pin !04 were located in any other of the index holes !05 than in the one provided for a th second or slow position, said dog !83 would have been thrust away from pin 60 before said upturned end 200 was brought, into position in front of pin 6!. The purpose of this con'struction is to guard against the retarding action of the shutter curtain, so that only the second curtain 35A will be retarded when the curtains are set for the right angies forming a shelf 2!9, most clearly shown in Figs. 19, 29 and Mounted on the .of gear teeth. 224 which mesh with pinion 225 mounted on shaft 22'6. Also mounted on shaft 228 is a star wheel 221, which is engaged by an escapeinent plate 228 mounted on a shaft 229.

Also attached to shaft 229 and caused to move with escapement plate 228, is an oscillating member 230 having one end bent downward to engage a slot 2'3! of inter-tia-member 233 mounted on a shaft 234. The said mechanism is also provided with a top bearing'plate 235, most clearly shown in Figs. 17 and 19'.

Itwill be evident that any motion of member 205 in a rotary direction around pivot 223 will cause the sector member 220 to be oscillated on shaft 223, and since said sector member 220 is provided with gear teeth 224 meshing with pinion 22'5, star wheel 22'!` will be'caused to rotate. The escapement 228 is so constructed that as star wheel 22'! rotates, oscillating member 230 is caused to move so as in turn to 'oscillate inertia-member 233. This action puts a deflnite load upon sector 220 causing retarding action to be transmitted through member 205, shaft 202 and retarding lever !89. v I

The platform member 2!9 is also supported from the bottom of the camera by support member 236. Since the retarding lever 99 (Fig. 25) is provided with the two cut-out sectors 20!, and

the shutter speed control mechanism is provided with two fingers !96, !96, which are positioned as clearly shown in Fig. 24 in dotted lines, the distance the retarding lever !99 can travel in a clockwise direction under the action of spring 209 is determined by the setting of slow shutter speed pointer 26. Since flngers !96, !96 are controlled by the slow shutter speed point 26, this position with respect to sectors 20! is denitely determined. Spring 209 tends to cause retarding lever 99 to travel in clockwise direction until one end 'of sector 20! is stopped by a finger !96. Fingers !96 can be changed in position so that the upturned end 200 of retarding lever !99 can be set to engage pin 6! immediately after curtain winding gear 52' has 'been released, thus providing the longest shutter opening. If retarding lever !99 is so positioned that. pin 6! barely contacts with the upturned end 200, thus moving lever !99 only slightly', a. Very short retardation of curtain winding gear 52 will take place.

Any one of the intermediate speeds is provided 'I for by the series of holes !05 in the cam plate 54, thus providing any pre-selected time lag between the instant the first curtain is released and the instant the second curtain 35A is released. After pin 6! has passed said upturned end 200 of the retarding lever !99, said lever with its upturned end 200 is then returned to the starting position under the influence of spring 209. When the retarding lever !99 is in position for the longest exposure, it will be in the position shown in dotted lines, Figs. 8 and 16. When the slow shutter speed control fingers 26 is set for "instantaneousj' said retarding lever !99 and its upturned end 200 will be in the position shown in Fig. 27, so that pin -6! does not contact with upturned end 200 as curtain winding gear 52 and the second curtain 35A is allowed to run down. Thus no retarding action is provided at such time.

The operation of the several slow shutter speeds is exactly the same as for an instananeous exposure excepting that either index !06 or shutter knob 25 is set to the position 25-S on shutter setting dial !02 and the slow shutter speed nger 26 is set to the speed desired. The button 22 is released in the usual manner for making an exposure.

The mirror frame !49'swings up and causes the first curtain 35 to. be released in the same manner as for instantaneous exposure. As said first curtain35 runs down, pin !04 contacts with arm !22, thereby disengaging dog !83 from the pin 60. Just prior to this, the shaft 202 'was raised under the influence of cam face 2!8 and lever 2!3, so that 'the upturned end 200 was brought in position in front of pin 6!, and sothat even though the second curtain winding gear 52 of the second curtain 35A was released, said gear 52 cannot rotate until it hascaused retarding lever !99 to move out of the path of pin 6!.

Film feed'ng and shutter interlock.--The film feeding and shutter interlock mechanism will next be described.

.To load the camera, a film Cartridge of standard manufacture is placed in film chamber 41 (Flg. 2) over shaft end 43 and shaft key 44. The spool of the Cartridge is held central with stud 45 mounted on a spring hinge (not shown). An empty spool is placed in take-up film chamber 48 in a similar manner, and the film on the spool in film chamber 4'! is led across the back of the camera and engaged with the spool in take-up film chamber 48. The cover 238 is then replaced.

The structure otthe film chambers is most clearly shown in Fig. 29, the take-up chamber only being there shown. The take-of! chamber is of sim- !lar construction. The film spool flange is shown at 258. 'I'he film spool is, of course, provided with ilanges on both sides of the mm strip. The film spool core is shown at 240 and the film at 24! as passing over an idler 242, and across the camera back plate 245 riveted to the film chamber housing 54 by rivets 244. The film ohamber housing is also connected to the camera housing 25 by screws 245. Attached to the film housing is a pressure spring 245 held in place by rivets 241, 241. Attached to the camera cover 255 is a spring 248 by means of rivets 249. The purpose of said spring 248 is to hold a pressure plate 250 in contact with the film strip 24l. The said pressure plate 250 is held to spring 248 by shoulder rivet 25!. The camera back cover 255 is provided with the usual slide looks designated as 25 in several of the figures, particularly'Figs. 1 and 29. As previously stated, the structure of the other half of the camera is not shown in Fig. 29, but is substantially the same.

It was previously pointed out that as lever 24 (Fig. 1) is rocked forward and back, the film 24! 'is caused to wind up on the film spool core 240 (Fig. 29) at the same time that the shutter is rewound and that it is necessary to continue winding film even though the shutter is completely wound, so as to advance the film a sumcient distance to expose a new' surface thereo! for the exposure opening, and when su'flloient film has been i advanced, forward motion oi lever 24 is arrested.

I will now describe the means for doing this.

As clearly shown in Fig. 35, 'the shaft 45 has a key 44 onto which the take-up spool is fltted. said shait 45 passes through the camera wall or casting 52 and has a pinlon 252 attached thereto. Under said pinlon 252 is a spacing washer 255, and the pinlon 252 has a knurled surface 254 pressed into a hole in shalt 45. said pinlon 252 meshes with a gear 255 which has a pinlon 255 !orming a hub on gear 255. A washer 251 is riveted to pinlon 255. thus forming a short hub at the under side' oi' gear 255, which rotates around a short 255a !astened into the casting 52 and prevented from turning therein by a knurled portion 255. said pinlon 255 meshes with a gear 255 having a hub 250. On the upper surface of said gear hub 250 !s placed an index plate 252. A shait 25! with a reduced end 255 passes through a hole in the index plate 252 and a hole in gear 255 and is riveted thereto, thus holding gear 255, index plate 252 and shait 25! as an integral unit. The upper end of said shaft 25! is provided with flat; 254, 254 over which the knob is titted, !t having a hole so shaped as to nt the said shai' t flat! 254, 254. The-knob is held in place by a flllister head screw 255. The measuring mecha- .nism cover !5 is provided with a hub 255 through which shalt 25! passes.

A spring 251a rides in a slot over hub 255a and presses downwardly onto index plate 252.' This structure provides means for setting index plate 252 at any predetermlned point by raising knob 55, thus disengaging gear 255 from pinlon 255.

and allowing knob 55 to be turned together with index plate 252. said index plate 252 is provided with a series ot notches 255, 255, most clearly shown in Fig. 32. These notches are provided with numbers from to !2, each repreenting an exposure area on the nini. At the p ition of each notch ia a turned-down lip or assas-s tooth 251, most clearly shown in Fig. 36 and in detail in Figs. 33 and 34.

On :the shoulder screw 81 (Figs. 32, 37, 38) is pivoted a lever 258 having a hole 258 and also having an upturned end 210 (Figs, 33, 34). To the under side of lever 258 is secured by rivet 212 a spring 21! (Figs. 33, 36) which is provided with a clearance hole to clear the bushing ssa (Fig. 36). The forward end oi' spring 21! is prevented from moving laterally by means oi a pin 215 (Figs. 36, 37, 38) passing through a hole in spring 21!, which is allowed to move downward away !rom lever 255 when riding over turned-down' portions 251. said spring 21! is provided with an extending lip 214, Fig. 37, also shown in dotted lines in Fig. 38. Through the hole 255 oi' the lever 258 passes an upturned end of a shat t 215, which passes across the back of the camera and is threaded into a bushing 215 of the looking plate 211, as most clearly shown in F'igs. 32 and 36. said looking plate 211 is provided with a slot 215 through which the shoulder screw !84 passes, and with a second slot 215 through which shoulder screw 280 passes. Said looking plate 211 is free to slide horizontally under the control of lever 255 and pin !28 of the rocking member !25. As shown in Fig. `9, the looking pin !25 is in such a position that it is about to move looking plate 211 to the right..

The latter is provided with an extending arm having a point 25! which engages ratohet !25 'as shown in Fig, 9, wherein locking plate 211 has been moved all the way to the left, thus causing point 25! thereof to engage teeth oi' ratohet !25. said looking plate 211 has been caused to move to the leit under the influence of spring 282, shown in Fig. 32, which has oaused lever 255 to move in a clockwise direction and upturned end 210 has entered the No. 1 slot of the index plate 252. The motion of lever 258 is transmittd to the looking plate 211 by said shalt 215,

as most clearly shown in Fig. 32. The ratohet having placed a spool o! film in the supply cham-.

ber and threaded the mm onto the empty spool in the take-up chamber and the camera back is replaced, the shutter release button 22 is pressed, causing looking member 211 to be moved to the right in a manner previously described. This will cause shaft 215 to be also moved to the right and lever 255 to be swung in a contraclockwise direction, thus disengaging upturned end 210 from anyone oi' the slots 255 in which it may be engaged. The knob 55 is then raised and turned until zero marking 251 (Fig. 37) on index plate 252 appears underhole 25 in plate !5 (Fig. 1). The lever 24 can now be operated until- No. 1

4 on nlm strip appears under the ruby window (not shown) in the camera back cover 255. When No. 1 on the film appears. knob 50is again raised and 'numeral No. 1 o! index plate 255 is placed under peep hole 25 in 'plate !5. The camera is now in position for making the first exposure. As the lever 24 is operated, the shutter is rewound, and the mirror is reset. It has just been described how the nrstexposure area o! the i'ilm strip i:

put in position tor the first exposure. The mechu 

